Phillip Holliday was born in Cardiff. He attended Pen-Y-Bryn Primary School and Llanrumney High School in Cardiff. He went on to complete the examinations for the Association of Accounting Technicians (AAT) at Gwent Tertiary College, Newport Campus. He then studied at the University of Wales Newport, successfully completing the examinations for the Association of Chartered Certified Accountants (ACCA).
His first job was as a Finance Clark at ATL Telecom in St.Mellons. He then went on to work for Agincourt Practice Chartered Accountants and then HSJ Accountants as a Senior Accountant. He became self-employed in 2005, initially sub-contracting for local accountants such as RJ Lewin & Co and Ron Coates & Co. However, he then grew his own client base. PH Accounting became a Limited Company in April 2012. Phillip mostly works alone but sometimes gets a little bit of extra help when required.